Research on the practice and theory of tax law Research on precedent and theory of tax law Research on basic theory of tax law Research on the equity of tax law Research on chinese practice and development of Marxist law theory Research on lawyers' practice and theory Research on the theory and system of fiscal law Research on Kelsen's theory and practice in the history of rule of law Research on theory and practice of Chinese fashion law research on the army's tactics and training of late Qing dynasty